package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.mapper.EmployeeMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.EmployeeService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;

    //根据id删除分类
    @Override
    public void remove(Long id) {

        //查询当前分类是否关联了菜品，如果关联则抛出异常
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Dish::getCategoryId,id);
        int count = dishService.count(queryWrapper); //这里用的是count（*）函数
        if(count > 0 ){
            throw  new CustomException("当前分类下关联了菜品，不能删除");
        }


        //查询当前分类是否关联了套餐，如果关联则抛出异常
        LambdaQueryWrapper<Setmeal> queryWrapper2 = new LambdaQueryWrapper<>();
        queryWrapper2.eq(Setmeal::getCategoryId,id);
        int count2 = dishService.count(queryWrapper);
        if(count2>0){
            throw  new CustomException("当前分类下关联了套餐，不能删除");

        }
        //正常删除分类(就是调用父类的方法去删除，还是IService里面的方法去删除)
        super.removeById(id);


    }
}
